FILE - In a Thursday, Dec. 3, 2009 file photo, South Carolina first lady Jenny Sanford, right, looks on as her husband Gov. Mark Sanford, takes a photo with guests at the Governor's Mansion in Columbia, S.C., during a Christmas Open House. Jenny Sanford announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with Maria Belen Chapur. (AP Photo/Brett Flashnick, File)— AP

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FILE - In a Thursday, Dec. 3, 2009 file photo, South Carolina first lady Jenny Sanford, right, looks on as her husband Gov. Mark Sanford, takes a photo with guests at the Governor's Mansion in Columbia, S.C., during a Christmas Open House. Jenny Sanford announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with Maria Belen Chapur. (AP Photo/Brett Flashnick, File)
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FILE - In a Friday, Aug. 7, 2009 file photo, South Carolina first lady Jenny Sanford, right, carries out her belongings from the Governor's Mansion with help from an unidentified friend, in Columbia, S.C. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with an Argentine woman. (AP Photo/Mary Ann Chastain, File)— AP

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FILE - In a Friday, Aug. 7, 2009 file photo, South Carolina first lady Jenny Sanford, right, carries out her belongings from the Governor's Mansion with help from an unidentified friend, in Columbia, S.C. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with an Argentine woman. (AP Photo/Mary Ann Chastain, File)
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FILE - in a Thursday, Aug. 13, 2009 file photo, South Carolina Gov. Mark Sanford listens to remarks during the Budget and Control Board meeting, in Columbia, S.C. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with an Argentine woman. (AP Photo/Mary Ann Chastain, File)— AP

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FILE - in a Thursday, Aug. 13, 2009 file photo, South Carolina Gov. Mark Sanford listens to remarks during the Budget and Control Board meeting, in Columbia, S.C. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with an Argentine woman. (AP Photo/Mary Ann Chastain, File)
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FILE - In a Wednesday, June 24, 2009 file photo, South Carolina Gov. Mark Sanford looks at his notes as he admits to having an affair during a news conference, in Columbia, SC. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce.(AP Photo/Mary Ann Chastain)— AP

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FILE - In a Wednesday, June 24, 2009 file photo, South Carolina Gov. Mark Sanford looks at his notes as he admits to having an affair during a news conference, in Columbia, SC. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce.(AP Photo/Mary Ann Chastain)
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FILE - In a Sunday, Feb. 22, 2009 file photo, South Carolina Gov. Mark Sanford, right, and his wife Jenny, left, arrive at the White House to attend a dinner hosted by President Obama, in Washington. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with an Argentine woman. (AP Photo/Pablo Martinez Monsivais, File)— AP

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FILE - In a Sunday, Feb. 22, 2009 file photo, South Carolina Gov. Mark Sanford, right, and his wife Jenny, left, arrive at the White House to attend a dinner hosted by President Obama, in Washington. Jenny Sanford, South Carolina's first lady, announced Friday, Dec. 11, 2009 that she has filed for divorce, months after her husband publicly confessed an affair with an Argentine woman. (AP Photo/Pablo Martinez Monsivais, File)
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CHARLESTON, S.C. 
South Carolina first lady Jenny Sanford says she tried many times to reconcile with Gov. Mark Sanford after his affair with an Argentine mistress he famously called his "soul mate." Ultimately, the first lady filed for divorce.

The decision revealed Friday came two days after state lawmakers stopped short of recommending her husband's removal from office for a top-secret June rendezvous with Maria Belen Chapur.

Jenny Sanford, a former Wall Street executive who helped launch her husband's political career, said Friday their 20-year marriage could not be repaired.

"I am still dedicated to keeping the process that lies ahead peaceful for our family," she said in a brief statement.

A day earlier, the governor told reporters he still hoped they could reconcile. On Friday, he blamed himself for what he called "the moral failure that led us to this tragic point."

"Jenny is a great person, and has been a remarkable wife, mother and first lady," he said in a statement.

Both Sanfords mentioned their four sons, who have lived with their mother at the family's coastal home on Sullivans Island since she moved out of the governor's mansion in August.

"While our family structure may change, I know that we will both work earnestly to be the best mom and dad we can be to four of the finest boys on earth," Mark Sanford said.

Jenny Sanford's divorce complaint on the grounds of adultery did not mention money, property or custody arrangements.

Earlier this week, Jenny Sanford said in a television interview that it was a simple decision to not stand with the governor when he publicly confessed the affair.

"Certainly his actions hurt me, and they caused consequences for me, but they don't in any way take away my own self-esteem," the 47-year-old told ABC's Barbara Walters, who named her one of the most fascinating people of 2009. "They reflect poorly on him."

Mark Sanford, 49, disappeared for almost a week in late June to see Chapur, leaving his staff and his wife in the dark about where he was. His staff told reporters he was hiking the Appalachian Trail. He returned and tearfully confessed the affair at a rambling news conference.

Jenny Sanford said then she was willing to reconcile with the two-term governor, once mentioned as a possible 2012 GOP presidential contender. She weathered the publication of passionate e-mail exchanges between her husband and Chapur, and an Associated Press interview in which he called his mistress his "soul mate" and admitted "crossing the line" with other women.

Jenny Sanford, who is working on a memoir, said she learned about the affair in January when she found a copy of a letter her husband wrote to Chapur. In the months following, he asked several times to visit his mistress. His wife said no.

"It's one thing to forgive adultery; it's another thing to condone it," she told the AP two days after her husband revealed the affair.

Marjory Wentworth, a close friend of Jenny Sanford, said she knew the filing was coming.

"No matter what the circumstances are, you go through a period that is sort of muddled - you're still a family, even though everyone knew she moved down here. I think it's been that kind of strange transition," said Wentworth, who is South Carolina's poet laureate. "Limbo is a tough place to be."

As first lady, Jenny Sanford has little official role in state government, but she has been a quiet presence since her husband took office in 2003, often attending morning meetings with his top staff and working on a public health campaign.

Born Jennifer Sullivan, the first lady grew up near Chicago. Her grandfather founded the Skil Corp., a power tool manufacturer. She graduated from Georgetown University in 1984 with a degree in finance, then worked for the Wall Street investment banking firm Lazard Freres & Co., where she was a vice president. The Sanfords met in New York in the 1980s, when Mark Sanford also was working in finance.

They married in 1989 and relocated to South Carolina, where Sanford worked in real estate before serving three terms in Congress. He becomes the first sitting governor to divorce in South Carolina, which only started allowing it in 1949.

Over the past few months, he has sought to regain credibility during a statewide apology tour and rebuffed repeated calls to leave office.

On Wednesday, a legislative panel considering whether to impeach him instead recommended a formal rebuke.

The panel said his trips to see Chapur in Argentina and his use of state planes for personal and political trips brought "ridicule, dishonor, disgrace and shame" to the state he was twice overwhelmingly elected to lead.

Sanford is term-limited and will leave office in January 2011. Asked Thursday whether he had cut off contact with Chapur, a divorced mother of two who has worked as an English interpreter and market researcher, he declined to answer.